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Pension Plans | 6 Months Ended
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Jun. 30, 2021
Pension Plans |
Pension Plans | 11. PENSION PLANS: Net periodic pension expense (benefit) reflected in other gains and (losses), net in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Interest cost | ​ | $ | 478 | ​ | $ | 675 | ​ | $ | 950 | ​ | $ | 1,351 | ​
Expected return on plan assets | ​ |  | (1,028) | ​ |  | (1,054) | ​ |  | (2,047) | ​ |  | (2,109) | ​
Amortization of net actuarial loss | ​ |  | 295 | ​ |  | 281 | ​ |  | 584 | ​ |  | 563 | ​
Net settlement loss | ​ | ​ | 566 | ​ | ​ | — | ​ | ​ | 566 | ​ | ​ | — | ​
Total net periodic pension expense (benefit) | ​ | $ | 311 | ​ | $ | (98) | ​ | $ | 53 | ​ | $ | (195) | ​
​ As a result of increased lump-sum distributions from the Company’s qualified retirement plan during 2021, a net settlement loss of $0.6 million was recognized in the three months and six months ended June 30, 2021. ​ In addition, the increase in lump-sum distributions required the Company to re-measure its liability under its pension plan as of June 30, 2021. As a result of the re-measurement, as well as an increase in the pension plan’s assumed discount rate from 1.95% at December 31, 2020 to 2.31% at June 30, 2021, the Company recorded a $6.9 million decrease to its liability under the pension plan and a corresponding decrease in accumulated other comprehensive loss in the accompanying condensed consolidated balance sheet at June 30, 2021.

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